There’s no need to bring beer and a cooler to your picnic. With a few simple modifications, you can turn the box of any case of beer into a simple ice chest.

If you’re trying to save packing space—or just forgot to bring the cooler—YouTuber DaveHax demonstrates a perfect alternative in this video. Cut open the top of the box to make a lid, pull all of the beer out, line it with a plastic bag, and put the beer back in. Now just add plenty of ice and your beer will stay nice and cool for hours. No extra equipment needed.